Three-roll grinding device for carbon nanotube conductive paste
By introducing a composite cleaning mechanism of cleaning strips and air-blowing cleaning plates into the three-roll mill, the problem of carbon nanotube conductive slurry residue after milling was solved, achieving efficient slurry delivery and equipment cleaning, and improving milling efficiency and production continuity.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- YINGDE CHUANGZHI NEW MATERIAL TECH CO LTD
- Filing Date
- 2025-06-09
- Publication Date
- 2026-05-29
AI Technical Summary
In existing three-roll milling equipment, after grinding carbon nanotube conductive slurry, the slurry tends to remain on the surface of the grinding rollers, resulting in poor material feeding, affecting grinding efficiency, increasing material waste and equipment pollution, and requiring frequent manual cleaning.
A composite cleaning mechanism combining cleaning strips and air-blowing cleaning plates is adopted, along with pre-crushing by the crushing shaft and air-blowing assisted feeding, forming a "scraping and air-blowing" cleaning method. Combined with the fan design of the discharge hood, it achieves rapid stripping and efficient conveying of slurry.
It effectively avoids slurry retention, reduces the frequency of manual cleaning, improves grinding efficiency, reduces energy consumption, and ensures continuous slurry production.
Smart Images
Figure CN224293338U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of grinding technology, specifically relating to a three-roll grinding device for carbon nanotube conductive slurry. Background Technology
[0002] In the preparation of carbon nanotube conductive paste, a three-roll mill is a commonly used key piece of equipment. It grinds the paste by rotating the milling rollers to meet the particle size and uniformity requirements of the conductive paste. However, existing three-roll mills have a significant problem in practical applications: after grinding, the carbon nanotube conductive paste, due to its viscosity, easily remains on the surface of the milling rollers. Furthermore, traditional devices lack efficient cleaning and feeding aids, resulting in an unsmooth process of the paste detaching from the milling rollers and being fed into the feed inlet. This not only affects grinding efficiency but may also lead to material waste and equipment contamination due to long-term slurry residue. Frequent shutdowns for manual cleaning are even necessary, increasing production costs and operational complexity. Utility Model Content
[0003] The purpose of this invention is to provide a three-roll milling device for carbon nanotube conductive slurry, so as to solve the problems mentioned in the background art.
[0004] To achieve the above objectives, this utility model provides the following technical solution: a three-roll milling device for carbon nanotube conductive paste, comprising:
[0005] A grinding frame is provided with grinding rollers A, B, and C rotatably mounted on the inner side of the upper end face for grinding carbon nanotube conductive slurry. A cleaning strip is provided longitudinally between the bottom sides of grinding rollers B and C for cleaning the slurry on both grinding rollers simultaneously. A feeding cover is mounted at the ends of grinding rollers A and B for pre-crushing and air-blowing feeding of carbon nanotube conductive slurry.
[0006] The grinding frame has a storage box for feeding the grinding device on one side of the end, and an air-blowing cleaning plate for air-blowing cleaning of residual slurry on the surface of the grinding roller A is inclined on one side. The grinding frame has a discharge hood with the discharge port facing downward to blow the ground slurry downward for rapid discharge.
[0007] Preferably, one end of the grinding roller A and grinding roller B has a rotating shaft that extends to the outside of the grinding frame and is equipped with mutually meshing, oppositely rotating drive teeth. The grinding roller C rotates in the same direction as the grinding roller A, and one end of the grinding roller C has a rotating shaft that extends to the outside of the grinding frame and is connected to a speed-regulating motor B.
[0008] Preferably, a speed-regulating motor A is installed on one side of the grinding frame via a base plate. The speed-regulating motor A is connected to one end of the grinding roller B via a rotating shaft, and the grinding roller A and grinding roller B move towards each other to grind the slurry through the meshing of the drive teeth.
[0009] Preferably, the inside of the feeding hood is provided with two opposing moving pairs of crushing shafts that enter the slurry for pre-crushing and are equipped with crushing blades, and one end of the crushing shaft rotates through to one side of the feeding hood and is externally connected to a servo motor.
[0010] Preferably, a material pump is connected to the outside of the storage box via a material pipe, and the outlet end of the material pump is connected to the end of the material discharge hood via a material pipe. An air pump is provided on the bottom side of the material pump, and a double-headed air pipe connected to the material discharge hood and the air blowing cleaning plate is connected to the air pump.
[0011] Preferably, one side of the air-blowing cleaning plate is uniformly provided with air-blowing nozzles that are inclined to one side of the grinding roller A, and the air-blowing cleaning plate is a hollow structure so that the incoming gas is concentrated and sprayed out to clean the slurry on the roller.
[0012] Preferably, the outer inclined surface of the discharge hood is provided with a blower for air-blowing and tilting the ground slurry, and a discharge plate extending to the bottom of the grinding machine frame is provided on one side of the bottom of the discharge hood, and a receiving frame is provided on the bottom side of the end of the discharge plate.
[0013] Compared with the prior art, the technical effects and advantages of this utility model are as follows: the three-roll milling device for the carbon nanotube conductive slurry...
[0014] The two grinding rollers are simultaneously scraped and cleaned by the cleaning strips on the bottom sides of grinding rollers B and C. Combined with the air blowing cleaning plate on the side of grinding roller A, the tilted air blowing nozzle blows in a directional manner, forming a composite cleaning mechanism of "scraping and air blowing". This can quickly remove the sticky slurry remaining on the surface of each grinding roller, avoid material waste and equipment contamination caused by slurry retention, and reduce the frequency of manual cleaning.
[0015] The feed material is pre-crushed by a crushing shaft with crushing blades inside the feeding hood, reducing the initial particle size of the slurry. Combined with the built-in air blowing function of the feeding hood, a pre-treatment process of "pre-crushing - air blowing conveying" is realized, which reduces the load on the subsequent grinding rollers. At the same time, the inclined air blowing design of the fan in the discharge hood forces the slurry after grinding to flow downward to the feed port, solving the problem of poor feeding in traditional devices and significantly improving the overall grinding efficiency.
[0016] By integrating the air pump and dual-head air pipe design, the air supply for the feeding hood air blowing, the air blowing cleaning plate blowing and the discharge hood fan feeding is integrated to form a unified pneumatic auxiliary system. While reducing the number of equipment parts, it ensures stable air pressure of each functional module, and achieves efficient transportation and cleaning of slurry from pretreatment, grinding to discharge with lower energy consumption. Attached Figure Description
[0017] Figure 1 This is a front view of the grinding device of this utility model;
[0018] Figure 2 This is a top view of the grinding device of this utility model;
[0019] Figure 3 This is a top view of the grinding device and strip cleaning plate of this utility model;
[0020] Figure 4 This is a top view of the material feeding cover of this utility model;
[0021] Figure 5 This is a side view of the air-blowing cleaning plate of this utility model.
[0022] In the diagram: 1. Grinding frame; 2. Grinding roller A; 3. Grinding roller B; 4. Grinding roller C; 5. Cleaning strip; 6. Feed hood; 7. Storage bin; 8. Air-blowing cleaning plate; 9. Discharge hood; 10. Drive gear; 11. Speed-regulating motor A; 12. Crushing shaft; 13. Servo motor; 14. Speed-regulating motor B; 15. Feed pump; 16. Air pump; 17. Double-headed air pipe; 18. Air-blowing nozzle; 19. Blower; 20. Feeding plate; 21. Receiving frame. Detailed Implementation
[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0024] Please see Figure 1-5 This utility model provides a technical solution: a three-roll milling device for carbon nanotube conductive slurry, comprising:
[0025] The grinding frame 1 has grinding rollers A2, B3, and C4 arranged horizontally and linearly on the inner side of its upper surface. The axes of these three rollers are parallel and their spacing is adjustable, forming the core working area of the three-roller grinding process. A cleaning strip 5, made of elastic wear-resistant material, is longitudinally fixed between the bottom sides of grinding rollers B3 and C4 via bolts. Its top cutting edge maintains a 0.5–1 mm gap with the outer surfaces of the two grinding rollers, allowing it to scrape away residual slurry synchronously with the rotation of the rollers during the grinding process. A discharge hood 6 is mounted above the feed ends of grinding rollers A2 and B3 via a bracket. The hood has an internal cavity structure with top feeding and bottom discharge. The inner wall of the cavity is smooth and inclined to facilitate slurry flow.
[0026] A storage tank 7 is fixedly installed on one side of the end of the grinding frame 1 via an angle steel bracket. Its internal capacity is designed to be 50-100L based on the equipment's processing capacity. An observation window and a level gauge are provided on the side of the tank. An air-blowing cleaning plate 8 is fixed at a 30°-45° angle to the discharge side of the grinding roller A2. The cleaning plate is 5-10mm away from the outer surface of the grinding roller A2. Air-blowing nozzles 18 with a diameter of 1-2mm are evenly distributed on the plate surface. The nozzle axis forms a 20°-30° angle with the tangent to the roller surface, ensuring that the airflow can effectively remove residual slurry from the roller surface. A discharge hood 9 is fixed to the end of the grinding frame 1 via bolts. Its discharge port has an inverted trapezoidal structure, and the internal channel is inclined at a 45°-60° angle, facilitating the rapid sliding of slurry under gravity and airflow.
[0027] The grinding rollers A2 and B3 have their shafts rotating through bearing seats to the outside of the grinding frame 1. The drive gears 10, fixedly mounted on the shaft ends, are spur gears with a module of 2-3. The center distance between the meshing gears is adjustable, allowing grinding rollers A2 and B3 to rotate in opposite directions. Grinding roller C4 is connected to grinding roller A2 via a synchronous belt, ensuring they rotate in the same direction. Its shaft end is connected to the output shaft of a speed-regulating motor B14 via a coupling, allowing for speed adjustment from 0-1500 r / min.
[0028] The grinding frame 1 has a base plate with a speed-regulating motor A11 mounted on it via a shock-absorbing pad. The output shaft of A11 is connected to the grinding roller B3 shaft via a gear reducer with a reduction ratio of 1:2-1:3, ensuring that grinding rollers A2 and B3 perform grinding operations with a suitable linear speed difference. Inside the discharge hood 6, two horizontally arranged crushing shafts 12 have evenly welded spirally distributed crushing blades made of hard alloy. The two shafts rotate in opposite directions via gear transmission at a speed of 800-1200 r / min. One end of the shaft extends through a sealed bearing to the outside of the discharge hood 6 and is directly connected to the output shaft of the servo motor 13.
[0029] The storage tank 7 is externally connected to a material pipe via a quick-release connector. The material pipe has an inner diameter of 15–25 mm and is sequentially connected to a suction pump 15 and the inlet at the end of the discharge hood 6. The suction pump 15 is a screw pump with a flow rate adjustable range of 5–20 L / min. An air pump 16 is fixed to the bottom of the suction pump 15. Its output end is connected to the internal air chamber of the discharge hood 6 and the hollow cavity of the air-blowing cleaning plate 8 via a double-ended air pipe 17. The air pipe has an inner diameter of 8–12 mm, and the air pump's working pressure is maintained at 0.3–0.5 MPa.
[0030] The air-blowing cleaning plate 8 is integrally formed from aluminum alloy, with an internal hollow cavity connected to the air-blowing nozzle 18. The nozzles are evenly distributed at 5-10mm intervals, forming a blowing area covering the entire surface of the grinding roller A2. The fan 19 is embedded in the external inclined surface of the discharge hood 9. The fan outlet forms a 30° angle with the internal channel of the discharge hood, and the wind speed can reach 5-10m / s. This ensures that the ground slurry slides quickly down the inclined discharge plate 20 under the push of the airflow. The discharge plate 20 forms an angle of 30°-45° with the horizontal plane, and its end extends directly above the collection frame 21. The bottom of the collection frame 21 is equipped with casters for easy movement and collection.
[0031] Specifically, during use, the carbon nanotube conductive slurry in the storage tank 7 is transported to the discharge hood 6 via the feed pump 15 and the feed pipe. The feed pump 15 can adjust the flow rate according to the grinding efficiency to ensure continuous and stable feeding. The two crushing shafts 12 inside the discharge hood 6 are driven to rotate in opposite directions by the servo motor 13. The crushing blades on the shafts perform preliminary crushing on the incoming slurry to reduce the particle size of the material and provide a uniform pre-treated slurry for subsequent grinding. The air pump 16 delivers compressed air into the discharge hood 6 through the double-headed air pipe 17, forming an airflow driving force while pre-crushing, and evenly pushing the crushed slurry into the feeding gap between the grinding roller A2 and the grinding roller B3.
[0032] Speed-regulating motor A11 drives grinding roller B3 to rotate, which in turn drives grinding roller A2 to rotate in opposite directions through end-meshing drive teeth 10, generating the shearing force required for grinding. Grinding roller C4 is driven by speed-regulating motor B14 and rotates in the same direction as grinding roller A2. The speed of the three rollers is independently adjusted by the speed-regulating motor to form a specific linear velocity difference. Rollers A and B rotate in opposite directions, while rollers A and C rotate in the same direction, ensuring that the slurry is fully crushed and sheared between the rollers. The pre-treated slurry enters the gap between grinding rollers A2 and B3 and is initially ground under the pressure and friction generated by the opposite rotation. Then, it is transferred to the gap between grinding rollers B3 and C4 for secondary grinding as the rollers rotate, and finally conveyed to the discharge end by the surface of grinding roller C4.
[0033] The cleaning strips 5 on the bottom sides of grinding rollers B3 and C4 are in close contact with the roller surface, scraping away residual slurry on the surface of the two rollers synchronously as the rollers rotate, preventing slurry accumulation from affecting the grinding effect. Air pump 16 supplies air to air-blowing cleaning plate 8 through double-headed air pipe 17. Inclined air-blowing nozzles 18 evenly distributed on its surface spray compressed air onto the surface of grinding roller A2, using the impact force of the airflow to peel off residual slurry from the roller surface, forming a composite cleaning mechanism of "mechanical scraping and airflow kinetic energy". The ground slurry rotates with grinding roller C4 to the discharge hood 9 area. The fan 19 outside the discharge hood 9 blows air inward at an angle, creating a downward airflow force. Combined with the inclined discharge plate 20 at the bottom of the discharge hood, the slurry quickly slides down to the collection frame 21 under the combined action of gravity and airflow, preventing blockage of the discharge port.
[0034] Speed-regulating motor A11 controls the opposing rotational speeds of grinding rollers A2 and B3 through gear meshing, while speed-regulating motor B14 independently controls the rotational speed of grinding roller C4. The speed can be adjusted in real time according to the viscosity of the slurry and the grinding precision to ensure grinding efficiency and quality. Air pump 16 supplies air to the material hood 6 and air-blowing cleaning plate 8 through double-headed air pipe 17, realizing the sharing of air source for pre-crushing air blowing, roller surface cleaning air blowing and discharge air blowing, simplifying the pipeline structure and ensuring stable air pressure.
[0035] The entire device, through the process design of "pre-crushing - multi-stage grinding - composite cleaning - air-blowing assisted discharge", solves the problems of incomplete cleaning of slurry residue and low feeding efficiency in traditional three-roll mills, and realizes efficient grinding and continuous production of carbon nanotube conductive slurry.
[0036] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A three-roll milling apparatus for carbon nanotube conductive paste, characterized in that, include: A grinding frame (1) is provided with grinding rollers A (2), B (3), and C (4) for grinding carbon nanotube conductive slurry on the inner side of the upper end face of the grinding frame (1). A cleaning strip (5) for cleaning the slurry of the two grinding rollers simultaneously is provided between the bottom sides of the grinding rollers B (3) and C (4). A feeding cover (6) for pre-crushing and air-blowing feeding of carbon nanotube conductive slurry is provided at the ends of the grinding rollers A (2) and B (3). The grinding frame (1) has a storage box (7) for feeding the grinding device on one side of its end. The grinding roller A (2) has an air-blowing cleaning plate (8) for air-blowing cleaning of residual slurry on the roller surface on one side of its side. The grinding frame (1) has a discharge hood (9) at its end for quickly discharging the ground slurry downwards by blowing it downwards from the discharge port.
2. The three-roll milling apparatus for carbon nanotube conductive paste according to claim 1, characterized in that: The grinding rollers A (2) and B (3) have one end of their rotating shafts that pass through to the outside of the grinding frame (1) and are equipped with drive teeth (10) that mesh with each other and rotate in opposite directions. The grinding roller C (4) rotates in the same direction as the grinding roller A (2). The grinding roller C (4) has one end of its rotating shaft that passes through to the outside of the grinding frame (1) and is connected to a speed-regulating motor B (14).
3. The three-roll milling apparatus for carbon nanotube conductive paste according to claim 2, characterized in that: The grinding frame (1) is equipped with a speed-regulating motor A (11) on one side of the base plate. The speed-regulating motor A (11) is connected to one end of the grinding roller B (3) by a rotating shaft and the grinding roller A (2) and grinding roller B (3) move towards each other to grind the slurry through the meshing of the drive teeth (10).
4. The three-roll milling apparatus for carbon nanotube conductive paste according to claim 1, characterized in that: The feeding hood (6) is equipped with two opposing moving pairs of crushing shafts (12) that enter the slurry for pre-crushing and are equipped with crushing blades. One end of the crushing shaft (12) rotates through to the outside of the feeding hood (6) and is connected to a servo motor (13).
5. The three-roll milling apparatus for carbon nanotube conductive slurry according to claim 1, characterized in that: The storage tank (7) is connected to a material pump (15) via a material pipe on one side outside. The outlet end of the material pump (15) is connected to the end of the material hood (6) via a material pipe. An air pump (16) is provided on the bottom side of the material pump (15), and a double-headed air pipe (17) is connected to the material hood (6) and the air blowing cleaning plate (8).
6. The three-roll milling apparatus for carbon nanotube conductive paste according to claim 1, characterized in that: The cleaning strip (5) is uniformly provided with air-blowing nozzles (18) that are inclined to one side of the grinding roller A (2), and the air-blowing cleaning plate (8) is a hollow structure so that the incoming gas is concentrated and sprayed out to clean the slurry on the roller.
7. The three-roll milling apparatus for carbon nanotube conductive paste according to claim 1, characterized in that: The outer inclined surface of the discharge hood (9) is provided with a blower (19) for blowing the ground slurry at an angle. The bottom side of the discharge hood (9) is provided with a discharge plate (20) extending to the bottom of the grinding frame (1). The bottom side of the discharge plate (20) is provided with a receiving frame (21).